import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../views/Login.vue'
import Home from '../views/Home.vue'
import Welcome from '../views/Home/Welcome.vue'
import Users from '../views/user/User.vue'


Vue.use(VueRouter)

const routes = [{
        path: '/',
        redirect: '/login'
    },
    { path: '/login', component: Login },
    {
        path: '/home',
        component: Home,
        redirect: '/welcome',
        children: [{
            path: '/welcome',
            component: Welcome
        }, {
            path: '/users',
            component: Users
        }]
    }
]

const router = new VueRouter({
    routes
})

router.beforeEach((to, from, next) => {
    //to 将要访问的路径
    //from 代表从哪个路径跳转而来
    //next 是一个函数，代表方行

    if (to.path === '/login') {
        return next()
    } else {
        if (!window.sessionStorage.getItem('token')) {
            return next('/login')
        } else {
            next()
        }
    }

})

export default router